Best Answer

probably hvac mode door stuck (foam or other) or mode door actuator broken - (cheap plastic) - this is an ugly job - find someone who has removed the dash in this type of vehicle before - set aside 300 bucks or more :(


probaly just needs a blend door acuator.gmjim


Air door controlled by the red and blue vac lines is broken (common fault). Default position is with all air going to defrost vents. See forums for GMC climate control problems for more help.


I own a 98 Chevy S10 that is exactly like the Jimmy (just different body styles S10 being a truck and Jimmy an SUV). I had a similar problem to yours, I was barely getting any air from my vents. I fixed it by flushing my coolant system with a flush system I bought at wal-mart that used an ordinary water hose to flush the system. After the flush my heater not only blew air better, but it got hot faster too.

I have owned two mid 90's GM S-10's with this problem. If you can hear the sound of air whistling behind the vent mode selector knob (sound varies as u torn the knob) your problem is there. The selector knob actually routes vacuum thrue the back side by opening and closing small passages on the back side of the knob. The rubber gets old and dirty and begins to leak. Replacing this switch was the cure for me. Or if you like to tinker and u r sharp, take it apart and clean it.

User Avatar

Wiki User

โˆ™ 2009-12-16 03:32:58
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What steps should be taken to troubleshoot a 98 Jimmy not blowing air to the floor vents?
Write your answer...
Related questions

'2000 gmc jimmy no floor heat but has defrost and vent heat'?

my 1998 gmc jimmy has no floor heat but i have defrost and ven heat

Where should vents be placed-ceiling or floor for AC?

should be on floor.

Should heating vents be placed in the floor or ceiling?

on the floor on the floor

Should you wear slippers on tatami floor?

No, you should not, as the floor can be easily damaged.

Why won't the Gm envoy recirculate on climate control stay on?

it won't stay on if your blowing it the floor or using defroster.

Where should floor vents heating to be place?

in the floor.

What type of buffing pad should you use on a laminate floor?

You should not buff a laminate floor.

Should you smoke weed you found on the floor?

whats on the floor?

Where is the heater core on a 1997 GMC Jimmy?

The Heater core on your 1997 Jimmy is on the passenger side inside the cab, but it is behind the black plastic close the floor, and very difficult to get at.

On a1996 corvette what causes the AC air to blow out of the defroster and floor vents for about 30 minutes before blowing out of the dash vents?

== ==

Why does the floor get damp when the evaporative cooler is on?

Your condensation line is stoped up. You can clean it out by using an air compressor blowing from the inside of house out.

Install a vinyl floor on top of another vinyl floor?

No, you should not.

Can the fuel pump inside the gas tank be accessed through the floor in a 95 jimmy 4wd 4dr?


Can a sibling to an albino give birth to an albino?

No, they can't. Because you like licking the floor, don't you, Jimmy?

How do you replace the floor in a 1987 Pontiac trans am Should it be rivited or welded in What type of welding is best Should the new floor overlap the old floor Other information would be appreciate?

The old floor should be cut out. Preferably with a plasma cutter. The new floor should be welded in. It would probably be best to leave some overlap, flange it and then spot or rosette weld the new floor to the overlap flanges.

What are Fundamental position of the arms and feet with illustration?

The arms should be on the floor and the feet should be at the side The arms should be on the floor and the feet should be at the side

Should a rabbit hutch have a floor or no floor?

Yes, a rabbit hutch should have a floor. What kind of floor depends on what kind of rabbit you have. Giant breeds should have a solid floor ON PART of the cage bottom so they can rest their hocks. The rest of the cage floor should be welded cage flooring NOT hail screen or chicken wire. They need a strong floor but a sanitary on that waste can fall thru readily. A smaller rabbit can be perfectly fine with a welded wire bottom.

What causes the air conditioner on a 2003 Chevy trailblazer to stop blowing through the ac vents and start blowing through floor and defrost vents?

Check for a vacuum leak -sounds like it is starving for vacuum and reverts to the default position

What should the Texture of Bathroom floor should be?

The bathroom floor should be of a slip-resistant material surface, whether it be tile, stone, vinyl, or carpeting.

What type of floor mat should I get?

You should get the factory recommended floor mat for your car. Anything else can be dangerous as we saw with the floor mat recall that Toyota did last year.

Does the ceiling fan go counter clockwise for summer use?

For summer use, the airflow should go down directly from the fan to the floor. For winter use it should pull the air from the floor towards the ceiling so it flows across the ceiling and around the room. So as to whether it should be clock-wise or counter clock-wise, that would depend on the angle of your blades. It's best to just stand under it when it's on. In the summer you should feel the air blowing on you from the fan and in the winter you shouldn't.

How do you remove the floor console in 1998 GMC Jimmy?

carefully pry up on the boot around the shifter disconnect the wires then take the box out of the console and there under the box should be the bolts to remove the complete console

What would be the steps to track down a problem of no heat blowing out the floor vents on a 98 Jimmy?

This problem can be an expensive one to fix because the whole heater box has to come apart. There is a plastic "hinge" that controls the opening and closing of the door. It is easily broken and jams up. The whole assembly has to be replaced. It's not an easy fix.

What is wrong if you cant change the acheater from blowing to the floor and windshield on a 97 3.4 Monte?

you have a vacuum leak check hoses, listen for leak on smaller hoses.vacuum controls the air that comes out of defroster , floor, or dash.

Why is there antifreeze leaking inside the 1995 GMC Jimmy?

Passenger side floor? Could be leaking heater core

Study guides

Create a Study Guide